Definitions
There are 2 meanings of the phrase
Muck Up.
Muck Up - as a verb
Make a mess of, destroy or ruin
Example: "I botched the dinner and we had to eat out"
Synonyms (Exact Relations)
Example Sentences
"I hope I don't muck up the presentation tomorrow."
"Please don't muck up my freshly cleaned room."
"Try not to muck up the recipe by adding too much salt."
"She always manages to muck up even the simplest tasks."
"I'm afraid I'll muck up the job interview and not get hired."